Grinder machine



Nov. 9, w48. E. F. HAGER GRINDER MACHINE Filed Feb. 2, 1945 2Sheets-Sheet l www T4 N MH R wf. m 1M A m E. F. HAGER GRINDER MACHINE 2Sheets-Sheet 2 Filed Feb. 2, 1945 Patented Nov. 9, 1948 yfUlNfr'reDSTATES PATENT l GRINDER MACHINE Em'il F. Hager, Queens Village, N. Y.ppli'cauon February 2, 1945, serial No. `575,749

This invention rela-tes to work grinding and dressing machines and lmoreparticularly to a machine having afspin'dle Afor driving a pair ofgrinding `'and dressing elements, and a support for holding "a tool:brother work at desired angles fformovem'ent relative to said elements.

IIt has `been the practice heretofore `to lprovide a work supportadjustable along a guide bar Another object ofthe inventionistorfprovide an l improved grinding and dressing machine having a worksupport guidi-ng bar disposed outside the `zone of flying particlesproducedby the vgrinding and dressing operations, l

rStill another object of vthe 'invention is to provide an improved worksupport for grindingand dressing machines capable `of Various angularadjustments -and/ or movements.

A 4further object `of the invention includes the provision of -a specialmountfor the vgrinding and dressing elements Aso that the hubv of thespindle does rnot `protrude `out [beyond the radial working face of thewheels; an easily removable guard for the grinding and lapping wheels;Aand-a bearing arrangement 4for the spindle which is easily adjusted to`remove end play.

-Ihe above and other objects `of the invention vwill #become moreclearly understood from the `following detailed descriptiontfo be read.in connection with the accompanying drawings` -ln which:

16 Claims. (C1. 51-125) f Fig. l1 'is 4a `plan -viewof a workgrindingand dressing machine accor-ding to A this invention;

Fig.. 2 is a fragmentary View in front elevation with parts in sectionof fthe grinder machine showing the Work support adjacent one of thegrinder elements; l

` Fig. .3 `is a sectional View taken substantially alonglinei3-3fofFig.-1; v Fig. i .is a cross sectional view takensubstantial-ly alongline-ll of Fig. 3; Y l

Fig. 5 is `a cross sectional view of a modiiied track structure for thework support; and

.-Fig. 6 is a view-in side -ele'vation of ajwork sup- ,porting table. y

Referring to Figs. l, 2` and 3 of the drawings la] i ba'se il is shownwith an opening 2 defined `by ya iiange 3 upon which is mounted agrinderY head I4. The head 1i includes a hollow stand .5 having bearings'such as indicated at 6 to support ya spindle 1. Each bearing is held inposition by a clamp 8; Fig. 3, which when loosened permits the taking upof slack i-n the bearingst, the clamp thereafter being tightened. Thespindle 1 supe ports'fr rotation,` grinding and dressing `wheel elements`9 `and 9a `preferably of the character having working surfaces on the``sides thereof. Each Wheel Yelement is partially covered with a :guardlll. A liquid lvcirculatingsystem Il directs cooling and cleaning liquidonto the Working surfaces l2 `ofeaolri of the elements Band 9u.

The `base Il includes an upturned `marginal riiange i3 to lprovide acatch basin for the liquid and cuttings during grinding and dressingoperations, the liquid and cuttings being removed by drain 'HL Mountedoutsidethe Vbasin on arms l5 `is a guiding bar :I6 for a carriage i7which supportsfa work 'holding post I8. The carriage is adjustable alongthe bar I6 and may be locked thereto in any ydesirable position by meansof lockingscrew I9. l

The bar t6 isdisposed parallelto the spindle "l. The frame of the4carriage Il is triangular` as viewed in plan, Fig. .1, and twocornersthereof -a'reA provided with bearing `elements 20 and `2| whichreceive the bar i6 vto guide the carriage 'alonga true line parallel tothe spindle L To- Ward the apex of the carriage is a dependingleg 22provided with a roller 23 which tracks upon amachine'd surface 2d` onthe base l; i

lfrdesired, the track surface 24 may be raised `as indicated at `25,Fig. 5. The roller 23 may also be `replaced by sliding surfaces such asprovided by `the `rod 26 and the curved foot member `2'l. -AStill yothermovable supporting and track rar'- -rangernentsmam of course, beemployed.

=As shown inFig. 4 the apex `of the carriage `I'l is provided with tWospaced support elements "-28 and 29 onto 4which a rock member 30 ismounted for-rocking `and sliding `movements as more particularly`described hereinafter. The rock member in `turn .-pivotally supports aIpost 3l. The post 3| is preferably supported with its long-is tudinalaxis fdisposed transverse to the axis of the rockmember 3Q. The member3D is provided with atubular socket ,32 for reception ofthe lower end-of the :post 3l, the .post being locked in position by lock screw 33..f On the socket 32 is keyed Aa calibrated dial 34- over whichis-disposed a pointer 35 keyed tothe post 3l. Thisprovides l oFFIcE `anangular indication of the adjusted position of vided with two legs 4|and 42 which straddle the end of the post 3|, the leg 42 being providedwith a lock screw 43 for securing the clamp inthe desired angularposition.

From the foregoing description it is clear that the post 3| may beadjusted to any desired angular position about its longitudinal axis andthe clamp 38 may be adjustable about an axis transverse to thelongitudinal axis of the post 3|. It will now be described how the postis made adjustable along an axis transverse to the longitudinal axis, orin other words, parallel to the axis of the spindle 1. It will also bedescribed how this mounting provides for rocking movementof the post 3|toward and away from the spindle 1 so as to provide movement ofthe Workbeing shaped relative to the surface I2 of the grinding element 9.

As vshown in Fig. 4 a trunnion .sleeve 45 is held by screw 49h insupport element 28 with a pusher pin 45 extending therethrough. Themember 30 is locked to the trunnion 45 by a lock screw 41. A secondtrunnion48 is held in position in the element 29 by a set screw 49a,Fig. 3. Disposed in the trunnion 4B is a retraction spring 49 the outerend of which carries a thrust pin 5D. Mounted in opposite ends of themember 30 are two thrust caps 5| and 52 having thrust points engagingpusher rod 46 and thrust pin 59 respectively. The inner end of thepusher rod 43 is engaged by a pin 53 held by crank 54 (see Fig. 3)carried by shaft 55. A second crank arm 56 is secured to the shaft 55which is engaged by a connecting pin 51 controlled by adjustment screw58. This screw is preferably provided with calibrations by which theextent of adjustments can be readily determined with respect to astationary pin disposed closely adjacent thereto.

By adjusting the screw '58 the crank arm 55 is forced to the right asviewed in Figs. 2 and 4 thereby causing the pin 53 to actuate pusher rod46 to the right. The pusher rod carries with it the member 35 therebymoving the post in a direction parallel to the axis of the spindle 1;This movement of the member 3B compresses spring 49. Retraction of theadjustment screw 58 permits the spring 49 to return the member 30 to theleft maintaining the pusher rod 4B against the pin 53. It will thus beapparent that by adjusting the screw 58 forward and backward the member30 is moved lengthwise of trunnions 45 and 48, relative to the carriageI1.

The rock member 30 when unlocked by releasing lock screw 41 is rotatableabout the trunnions 45 and 48. This provides spaced bearing surfaces at60, 60a for the member 30 thereby enabling the operator to rock themember 30 and the work supporting post 3| carried thereby about the axisof the trunnions 45, 48. In order to limit the rocking movement of themember 3D the member is provided with a stop lug 3| secured thereto bylock screw 62, the lug 6| being engageable with a stop pin 53 adjustabiysupported by set screw 64 on a projection 65 of the carriage |1.

The adjustment provisions for post 3| and clamp 38 permit thepositioning of the work such as tools at various predeterminable anglesrelative to the surfaces i2 of the work shaping elements 9 and 9a. Bymanipulating adjustment screw 58, the work may be moved into the cuttingsurface l2 while rocking the work to and fro across the face of thesurface I2.

In Fig. 6 Tshcw a worksupporting table 38a which may be substituted forthe work supporting clamp 38, the table beingwadjustable to desiredangles for free hand grinding and lapping operations. The base portionsof the clamp and the `table are identical as indicated by the likereference characters applied thereto in Figs. 3 and 6 respectively.

Another feature of the invention is the unique mounting arrangement` forthe grinding and lapping wheels. As shown in Fig. 2 the wheel 9a issupported on a anged collar 55 the inner edge of which is urged againstthe bearing assembly 6. The collar has a radially extended flange 81having threaded openings 58 for reception of the threaded portions ofbolts 69. The collar is held upon the spindle`1 by a circular nutlikeelement 1D threadably received on the threaded end 1| of the spindle,The wheel 9 or 9a, asthe case may be, is received on the collar againstthe iiange 61. The wheel is provided with openings aligned with openings58 for reception of bolts 69. A ring 12 is provided with openings alsoaligned with openings 68 for reception of bolt 69 whereby the wheelistightly secured in position. By this arrangement the wheel issupported at the very end of the spindle Without appreciable extensionbeyond the plane of the radial working face l2 of the wheel. Thisarrangement also providesfor quick removal and replacement of wheelswithout changing the position of the collar 6B and nut 10 or alteringthe end play adjustment of bearing arrangement 6.

As previously stated the outer housing 13 of the bearing 6 is engagedandheld in position within the grinder head by clamp 8. The spindle 1 Visprovided with ashoulder 14 against which the inner ball bearing race 15is heldby sleeve 16, collarY 66 and nut 10. The outer race 11 is held bythe housing 13 to which packing ring 19 is threaded. It will be clearthat any end play in the ball bearing arrangement may be removed byloosening the clamp 8 at 18, Fig. 3, and urging the ring 19 and housing13 to the right as viewed in Fig. 2. This forces the outer race 11 tothe right relative to inner race 15 which abuts against shoulder 14.Since the bearings at the opposite ends of spindle 1 are identical,objectionable end play in both bearings Ais removed by this oneoperation, the clamp on the opposite bearing being maintained in tightposition so that the force acting through spindle 1 also tightens theopposite bearing at the same time. 4The loosened clamp 8, of' course, istightened While the bearings are thus urged into the desired relation.Once this adjustment is made, removal and replacement of the wheels 9and 9a will not alter the adjustment, since as is easily seen, the wheelmounts are independent of the bearing assemblies.

rihe guard I8, according to this invention, may be provided withstraight sidewalls `which cover substantially al1 of the wheel exceptfora small portion at the front side of the grinder. The guard issecured on the grinder head by two bolts 8f3, Fig. 2, and 8|, Fig. 3.When these bolts are removed the guard may be removed or lifted from thewheel. This enables the guard to be easily replaced by other guardssiichas .those more fully open in front foru'se in conjunction with radius.lapping attachments, for example.

Attention is called to the fact ,that the grinder head comprises aminimum ,of partseasily assembled and adjusted. ATheistandarcl `"is castin one piece and the bore for the bearings 6 and spindle 1 is machinedin `one operatin."-The "system,

-While `I have shown and described the princi- .ples off my invention inconnection with spe lic "apparatus will be understood that such showingis intended to be illustrative ofthe'inven-tion only and not as limitingfthe scope "of the invention as set forth inthe .objects and appendedclaims. TI claim:

1. In a work shaping apparatus having a spindle and work shaping meanscarried by said` spindle, a bar disposed parallel to said spindle, acarriage mounted at least in part` on said bar for movement indirections parallel to said spindle, a member carried by said carriagewith a given axis thereof disposed at an angle to the axis of saidspindle, means on said carriage for moving said member relative to saidcarriage in directions parallel to said spindle, means for pivotallyadjusting said member about said given axis, a work supporting meanscarried by said member, and means for pivotally adjusting said worksupporting means about an axis transverse to said given axis.

2. In a work shaping -apparatus having a spindle and work shaping `meanscarried by the spindle, a carriage, means for moving said carriage forcoarse adjustment parallel to said spindle, a work supporting member onsaid carriage, i

a lever pivoted on said carriage and a threaded element to actuate saidlever to move said member for nne adjustment relative to said carriageand `in a direction also parallel to said spindle,

and a pivoted support for rockably supporting said member on saidcarriage about an axis parallel to said spindle.

3. In a work shaping apparatus having a grinder head provided with aspindle and at least one grinder wheel, and means to apply liquid tosaid wheel, abase disposed below said grinder head and having anupturned marginal flange to catch liquid and cuttings during grinderoperations, a carriage a bar horizontally disposed outside the confinesof said ange, means providing a track Within said marginal flange, andsaid carriage having means for engaging said bar and said track to guideand support said carriage for movement in direction parallel to saidspindle.

4. In a work shaping apparatus having a grinder head provided with aspindle and at least one grinder wheel, a base disposed below saidgrinder head, said base having an upturned marginal flange to form abasin, a carriage, a bar horizontally disposed outside the connes ofsaid flange for guiding said carriage for movement in directionsparallel to said spindle, and means providing a track on said baseWithin the connes of said ange, and means on said carriage for engagingsaid bar and said track.

5. An apparatus according to claim 4 further including a work supportingpost, means on said carriage pivotally supporting said post for move-:ment shone exis ef spi-nele In Weissweine snneseinshevine .s grinderneed .presided i .n @spindle end ai leest ene erineerrrheelfehsse`slsresed nelsw sei-e1 grinder need, said has@ having .en nninrnednenes; is `ferin s besinefber distese@ alone one side ef seid basin,`ineens .prei/.inline e sneek inseid'besn parallel te .seid red, e @erres fel" movement .a ber horizontaliydisnesed ediecens s neit sf .seid

upturned apgameans providing a track in said basin parallel to said bar,a carriage, and means to support and guide said carriage on said bar andsaid track.

8. Apparatus according to claim '7, wherein said bar is located on saidbase beyond said upturned flange so that the carriage overlies saidflange between said bar and said track.

9. Apparatus according to claim '7, wherein said track comprises a barmounted within said basin and said carriage includes a bearing elementadapted to engage the bar of said track.

10. A work support comprising a base having a pair of spaced supportelements, a hollow trunnion carried by each of said elements, a rodextending-through one of said trunnions, a spring disposed in the otherof said trunnions, a rock member carried by said trunnions for rockingmovement thereon, thrust elements carried by said rock member, one toengage said rod and the other to engage said spring in opposeddirections,` and means for moving said rod to adjust said rock memberlengthwise of said trunnions, said spring operating to hold said memberagainst said rod.

11. A work support comprising a base having a pair of hollow trunnions,a. rock memberI carried by said trunnions for rocking movement`thereon,` a rod extending through one of said trunnions for engagementwith said rock member, a spring` disposed in the other of said trunnionsto urge said member against said rod, and means for moving said rod toadjust said rock member lengthwise of said trunnions.

l2. A Work `support according to claim l1 and means adjustable to limitthe rocking movement of said rock member.

13. A Work support according to claim 1l wherein said means for movingsaid rod includes a leverage arrangement and an adjustment screw bywhich fine adjustment isobtainable.

14. A work support according to claim l1 wherein said adjustment screwis provided with calibrations and said base is provided with a pindisposed closely adjacent to said screw to provide a reference point fordetermination of the extent of the adjustment.

15. In a work shaping apparatus having a spindle and a work shapingmeans carried by said spindle, a carriage movable in a directionparallel to the axis of said spindle, a rock member,

bearing means on said carriage to support said member for rockingmovement, means to effect adjustment of said rook member lengthwise ofits bearing support, a post, said rook member having a socket forpivotally supporting said post, means on said rocking member and saidpost to indicate the angular relation thereof, the upper end of saidpost having a pin disposed transversely thereof, a Work support havingva pair of apertured legs to receive said pin, means to lock said Worksupport to said pin, and means on said pin and said Work support toindicate -the'angular relation thereof.

16. In a Work shaping apparatus having a spindle and a work shapingmeans carried by said spindle, a carriage movable in a directionparallel to the'aXis of said spindle, a rook member, bearing means onsaid carriage to support said member for rocking movement, a post, saidrock member having a socket for pivotally supporting said post, theupper end of said postl having a pin disposed transversely thereof, aWork support having a pair of apertured legs to receive said pin, andmeans to lock said Work support to said pin.

\ I EMIL F. HAGER.

REFERENCES CITED The following references are of record in the le ofthis patent:

' `UNITED STATES PATENTS Number Name Date Kampfe June A'7, 1887 HartleyOct. 15, 1895 Boys June 18, 190.1 Lomasney May 12,I 1903 Martin Oct, 15,1912 Heryngfel May 10, 1921 Muehlhauser Mar. 13, 1923 Delaval-Crow Aug.22, 1933 Kasch Mar. 8, 1938 Zwiok Jan, 17, 1939 Wagner et a1 Sept. 19,1939 Kuzmick Jan. 16, 1940 Blood Feb. 18, 1941 Thomason Mar. 28, 1944Green June 13, 1944

